#16 pty, effective user/group, pivot_root, vfork

[Alexandros Stergiakis]

This patch extends Tclx with the following commands:

id euser
id euserid
id egroup
id egroupid
Interface to seteuid/setegid
TESTED

id session
Interface to setsid
PARTIALLY TESTED

pty open ?-rdwr? ?-noctty?
pty grant channel
pty unlock channel
pty name channel
pty winsize ?cols rows?
Interface to grantpt, posix_openpt, ptsname, unlockpt & winsize get/set
Now Tcl can be used to write Terminal emulators and proper remote logging servers.
TESTED

rlimit resource ?softlimit hardlimit?
Interface to getrlimit/setrlimit
PARTIALLY TESTED

pivot_root newpath oldpath
Interface to pivot_root
NOT TESTED

vfork
Interface to vfork
NOT TESTED

[Alexandros Stergiakis]

Patch according to Tclx coding style and conventions

[Alexandros Stergiakis]

Logged In: YES
user_id=718576
Originator: YES

TclX.n NOT updated.

[Alexandros Stergiakis]

Logged In: YES
user_id=718576
Originator: YES

Sorry rlimit is not in this patch.